diff -r 525472fb477a include/carve/polyline_iter.hpp
--- a/include/carve/polyline_iter.hpp	Sun Jan 15 23:07:40 2012 -0500
+++ b/include/carve/polyline_iter.hpp	Wed Jan 18 00:41:13 2012 +0600
@@ -20,6 +20,7 @@
 #include <list>
 #include <iterator>
 #include <limits>
+#include <cstddef>
 
 #include <carve/polyline_decl.hpp>
 
